The one world, one beat colouring picture was influenced by the following images:

Source: http://commons.wikimedia.org/wiki/File:Harpist_playing.jpg
License: CC Attribution Sharealike
Author: Lhademmor and SpeedyGonsales

Source: http://en.wikipedia.org/wiki/File:Dhol_players.jpg
License: CC Attribution
Author: John Pannell

Source: http://en.wikipedia.org/wiki/File:GEO_Globe.jpg
License: CC Attribution Sharealike
Author: Christian Fischer